Yes, i want to put it under critical examination too.
To me the lofty claims that Quran is perfectly and eternally preserved as is in heaven fails the first test.
If i open the Quran, i see text that is arranged in books (Chapters) and verses; Aren't you aware the idea of arranging text into chapters and verse is a recent human invention to help him reference text? It is in invention just like vehicles were invented. A need arose and man sat down and thought how to improve or fulfill the need.
Anything on this?